Kustodiyev Boris – Portrait of MA Voloshin 900 Classic russian paintings

The picture has something of this: people, portrait, man, lid, jacket, mustache, facial hair, wear, outerwear, vintage, scientist, retro, person, veil.
Perhaps it’s a painting of a man with long hair and a beard holding a book in one hand and a cane in the other hand, with a mountain in the background.